9.) The furnace can be suspended from each corner by hanger bolts
(4 each 3/8-in. all-thread rod) cut to desired length, 1- X 3/8–in.
flat washer, 3/8–in. lockwasher, and 3/8–in. nut. Dimples are
provided for hole locations. (See Fig. 1.)
Since horizontal crawlspace installation is very similar to attic
installation, refer to Section VI, “Horizontal Attic Installation”.
The installation of a sheet metal shield in front of louvered control
panel is covered in Section VI.
For crawlspace installation, this same sheet metal shield must be
installed above louvered control panel. Extend sheet metal shield
over furnace top far enough to cover gas pipe entry hole.
VIII.
FILTER ARRANGEMENT
WARNING:
Never operate unit without filter access
door removed. Failure to follow this warning could result
in fire, personal injury, or death.
Fig. 8—Typical Attic Installation
A97516
30-IN. MIN
WORK AREA
6
″
MIN
TYPE-B
VENT
GAS
ENTRY
24
″
24
″
SHEET
METAL
SEDIMENT
TRAP
MANUAL SHUTOFF
GAS VALVE
LINE CONTACT ONLY PERMISSIBLE BETWEEN
LINES FORMED BY INTERSECTIONS OF
THE TOP AND TWO SIDES OF THE FURNACE
JACKET AND BUILDING JOISTS,
STUDS, OR FRAMING.
DOWNFLOW
SUBBASE
SHEET METAL
PLENUM
FLOOR
OPENING
FURNACE
(OR COIL CASING
WHEN USED)
COMBUSTIBLE
FLOORING
A96285
Fig. 6—Furnace, Plenum, and Subbase Installed on a Com-
bustible Floor
CD5 OR CK5
COIL ASSEMBLY
OR KCAKC
COIL BOX
FURNACE
SHEET METAL
PLENUM
FLOOR
OPENING
COMBUSTIBLE
FLOORING
A96284
Fig. 7—Furnace, Plenum, and Coil Assembly or Coil Box
Installed on a Combustible Floor
—8—
